Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc1a06e743c6aaad…

MALICIOUS

PDF

87.6 KB Created: 2021-06-19 08:59:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c5d4e2a55e7dc26c84b94f72a9bafd30 SHA-1: 13a9dae234657708ca85d77a2114a66886c863a1 SHA-256: bc1a06e743c6aaad626cefe9c498f4ed4c06c3a57325700393297c1a4d53c1aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress uploads and disposable hosting. The ML classifier and ClamAV also identified it as malicious. While no scripts were directly extracted, the structure and URL patterns suggest a phishing or redirection attempt, likely intended to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://bjbtrh.com/files/pic/file/watudedelanibekesomix.pdf In PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/b28ee839e916938c9ed5acb7b9332112/lugosonufegelalusikasov.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/e1ae01f5eb29e8619a7071cf9ca8312f/77408915029.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/razezolubokabiserusewob.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/97090535930.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/a149716527ff8a5a2981928ec9d3ee01/tamononezijoxana.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/jn6dpufm53bcic4jpgjvge0ab0/nukivanakiles.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/63a784c4bc9545d5d29ad116b0e8a145/42655515386.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/6opfg1tvbnq55u1oa8umqfs7n0/basejunulenapituxufum.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606df599ba7c0---bavavimavawisijuruvijemuk.pdfIn PDF document text
    • http://honda-vo.com/upload/file/wewozewadavivawakibim.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a358493054---10981127414.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/44565412104.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=cyber+hunter+aimbot+iosPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F8 2952 bytes
SHA-256: 013fc9f45313cdddd5762e6694753e55f6a85ad2eec225b6e17fd140af1ee5c7
font_01_sfnt_off0000ec87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC87 5040 bytes
SHA-256: 38da01f8326442fae589d13b3b39144f5b305b0afcb5b7a339cfd488864026f6
font_02_sfnt_off0000fd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 7536 bytes
SHA-256: f41f3c7fca4a46e53b8efdfec7d4ed8ac538d5b2922971ad624477f3453ad368
font_03_sfnt_off00011232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11232 12132 bytes
SHA-256: 492e7743387cd94537fca5ff4283996ce9c828d07f8f8430d1ca64d3669d9698
font_04_sfnt_off00013b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3A 16256 bytes
SHA-256: ca4ffdb906be291d1a735dcf9843602074c4077b7ffd930a9948ad34e84cb77a

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